EXTENSIONS

MongoDB-backed swamp datastore — distributed locks with TTL, heartbeat, and nonce fencing, plus a manifest+content-addressed-blob sync protocol that streams the datastore tier as inline-bytes cursor batches. Dirty tracking rides an append-only journal with ancestor coalescing (O(1) markDirty) and pushes reconcile dirty roots in batches rather than one round-trip each. Blobs over 15 MB are transparently chunked across multiple docs so they fit under MongoDB's 16 MB BSON limit. Ships a companion maintenance model and workflow that inventory, sweep orphaned blobs and aged tombstones, and compact reclaimed space — fanning out over every namespace in one execution. Scoped by tenant + repo namespace. Requires MongoDB 4.0+ as a replica set.

Swamp datastore backend on RethinkDB: a single-document atomic-CAS distributed lock (TTL heartbeat, nonce-gated forceRelease, stale-lock takeover), an r.now() health verifier, and a content-addressed sync tier (immutable blobs + doc-size chunking + a single rev-CAS manifest, with per-namespace manifest routing so repos sharing one database stay isolated). Wraps the proven @shrug/rethinkdb spike components.